diff --git a/unix/linux/types.go b/unix/linux/types.go
index 928ad3538..12937c9b7 100644
--- a/unix/linux/types.go
+++ b/unix/linux/types.go
@@ -4148,6 +4148,13 @@ type (
 	PtpSysOffsetPrecise C.struct_ptp_sys_offset_precise
 )
 
+const (
+	PTP_PF_NONE    = C.PTP_PF_NONE
+	PTP_PF_EXTTS   = C.PTP_PF_EXTTS
+	PTP_PF_PEROUT  = C.PTP_PF_PEROUT
+	PTP_PF_PHYSYNC = C.PTP_PF_PHYSYNC
+)
+
 type (
 	HIDRawReportDescriptor C.struct_hidraw_report_descriptor
 	HIDRawDevInfo          C.struct_hidraw_devinfo
diff --git a/unix/ztypes_linux.go b/unix/ztypes_linux.go
index 9daae9c06..384850ed3 100644
--- a/unix/ztypes_linux.go
+++ b/unix/ztypes_linux.go
@@ -4203,6 +4203,13 @@ type (
 	}
 )
 
+const (
+	PTP_PF_NONE    = 0x0
+	PTP_PF_EXTTS   = 0x1
+	PTP_PF_PEROUT  = 0x2
+	PTP_PF_PHYSYNC = 0x3
+)
+
 type (
 	HIDRawReportDescriptor struct {
 		Size  uint32